A wireless communication device and method includes selecting a group of neighboring base stations having a relatively stronger signal intensity among the neighboring base stations as servo base stations, and periodically detecting the signal intensities of the servo base stations and the candidate base station. Differences between the signal intensities of two selected neighboring base stations for each cycle of a continuous cycles are accumulated, where when the accumulated value exceeds a threshold value in a each cycle, the group of servo base stations are updated and weakest servo base stations with the strongest candidate base station in that cycle are replaced.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A wireless communication device, comprising: a signal detection unit configured for periodically detecting signal intensities of neighboring base stations comprising a group of servo base stations and one or more candidate base stations; a signal differential accumulation unit configured for accumulating differences between the signal intensities of two selected neighboring base stations for each cycle of a number of continuous cycles, to obtain a total value, wherein the two selected neighboring base stations comprise a servo base station having the weakest signal strength among the servo base stations and a candidate base station having the strongest signal intensity among the candidate base stations in the selected cycle; and a determination unit pre-storing a threshold value, and configured for determining whether the total value exceeds the threshold value for each cycle, and updating the group of servo base stations by replacing the weakest servo base station having the strongest candidate base station in a cycle if the total value exceeds the threshold value in the cycle.
2. The wireless communication device as claimed in claim 1 , wherein the signal differential accumulation unit is further configured for clearing the total value after the update.
3. The wireless communication device as claimed in claim 1 , wherein the signal difference accumulation unit is further configured for clearing the total value when in a cycle the strongest candidate base station is weaker than the weakest servo base station in signal intensity.
4. The wireless communication device as claimed in claim 1 , wherein the determination unit is also configured for updating the group of servo base stations by replacing the weakest servo base station among the servo base station with the strongest candidate base station among the candidate base station when in a cycle the strongest candidate base station is stronger than the weakest servo base station in signal intensity and the difference between the strongest candidate base station and the weakest servo base station exceeds the threshold value.
5. The wireless communication device as claimed in claim 1 , wherein the threshold value is 30 db.
6. A wireless communication method, comprising: selecting a group of neighboring base stations having a relatively stronger signal intensity among the neighboring base stations as servo base stations; periodically detecting the signal intensities of the neighboring base stations comprising the group of servo base stations and one or more candidate base stations; accumulating differences between the signal intensities of two selected neighboring base stations in each of continuous cycles, thus to obtain a total value, wherein the two neighboring base stations comprise a servo base station with having the weakest signal intensity among the servo base stations and a candidate base station with the strongest signal intensity among the candidate base stations in the selected cycle; determining whether the total value exceeds a threshold value for each cycle, and, if the total value exceeds the threshold value, updating the group of the servo base stations by replacing the weakest servo base station with the strongest candidate base station in that cycle.
7. The method as claimed in claim 6 , further comprising, if the strongest candidate base station is weaker than the weakest servo base station in signal intensity, after accumulating differences between the signal intensities of two selected neighboring base stations, the total value is cleared.
8. The method as claimed in claim 6 , further comprising, if in any cycle, the strongest candidate base station is stronger than the weakest servo base station in signal intensity and the difference between the strongest candidate base station and the weakest servo base station exceeds the threshold value, replacing the weakest servo base station with the strongest candidate base station.
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December 31, 2009
December 20, 2011
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